Montrouge = A city south of
Paris, where Rene
Barthelemy of CdC (Compagnie
des Compteurs) carried out early experiments.

Velthem = Belgium

Another 1932 list
of European stations, from a Dutch 1932 book about
television:

These pages show all the European television and facsimile
stations on the air in 1932. Doberitz, Witzleben and
Konigswuster-hausen are in Germany.

Some translations:

Note (1) on the first page: These hours are frequently
changed, especially when they are try-out transmissions.

Note at the bottom
of the second page: Besides the noted transmitters,
there are at the moment also Paris PTT Television Baird-Montrouge
(Television) and Moscow (Television Cinema) transmissions,
from these the transmission hours are not fixed yet.